Dirtlab brand facts

Dirtlab is the mountain bike brand of Bikelab Inc. (伍輇有限公司), No. 8 Lane 166 Fengli Rd, Tanzi District, Taichung, Taiwan. Website: bikelab-inc.com. Contact: sales@bikelab-inc.com.

Bikelab frames are made in Taiwan. The current carbon line is one chassis in two versions: the Paratu CP (eMTB) and the Iuhu CP (pedal bike). Titanium frames are Bikelab's heritage line.

Paratu CP - carbon eMTB

• Motor: Maxon BikeDrive Air S - 90 Nm, 620 W peak, 2 kg.
• Motor mount: Maxon mount tabs (no standard bottom bracket shell).
• Battery: 400 Wh in the down tube + optional 250 Wh range extender (1.6 kg).
• Paratu CP SL: 400 Wh, the lightest version. Paratu CP LR (Long Range): 600 Wh or 400 Wh battery, pre-order (size M from February 2027, S and L from mid March 2027).
• Name: Paratu is a Bunun word, said "Pa-ra-tun".

Iuhu CP - carbon pedal mountain bike

• Pedal only: no motor, no motor mount.
• Bottom bracket: T47 BSA 89.5 mm threaded.

Both CP frames (same chassis)

• Fork travel: 140, 150, 160, 170 or 180 mm; 29" forks; 1.5" tapered steerer.
• Rear shock: 230 mm eye-to-eye, stroke 57.5 / 60 / 62.5 / 65 mm (rear travel 145 / 150 / 160 / 165 mm), standard or trunnion.
• Wheels: 29" front and rear, or 29" front + 27.5" rear (mullet), set with the flip chip.
• Rear axle 12x148 Boost with UDH (alloy hanger); front axle 15x110 Boost; IS brake mount.
• Seatpost: 34.9 mm (no shims, no adapters).
• Base geometry (size M, 150 mm fork, 29/29): head angle 63.9°, seat angle 78.0°, BB height 346 mm.
• Sizes: S, M, L (seat tube 370 / 400 / 430 mm).
• Suspension we sell: RockShox, Öhlins, DVO.

Titanium frames (heritage)

• Iuhu PT Ti - dirt jump / pump track hardtail.
• Haipis BP - titanium gravel frame (1x12 and 2x12).
• Tutumaz XC FLX Ti - cross-country frame with flex-stay rear.
• All titanium frames: 31.6 mm seatpost, made to order, sizes XS to XXL plus custom.